<template>
  <div class="sidebar">
    <el-menu class="sidebar-el-menu" :default-active="onRoutes" :collapse="collapse" background-color="#324157" text-color="#bfcbd9" active-text-color="#20a0ff" unique-opened router>
      <template v-for='(item,key) in items'>
        <template v-if="item.subs">
          <el-submenu :index="item.index" :key="key">
            <template slot="title">
              <i :class="item.icon"></i>
              <span slot="title">{{ item.title }}</span>
            </template>
            <template v-for="(subItem,subKey) in item.subs">
              <el-submenu v-if="subItem.subs" :index="subItem.index" :key="subKey">
                <template slot="title">{{ subItem.title }}</template>
                <el-menu-item v-for="(threeItem,i) in subItem.subs" :key="i" :index="threeItem.index">{{ threeItem.title }}</el-menu-item>
              </el-submenu>
              <el-menu-item v-else :index="subItem.index" :key="subKey">{{ subItem.title }}</el-menu-item>
            </template>
          </el-submenu>
        </template>
        <template v-else>
          <el-menu-item :index="item.index" :key="key">
            <i :class="item.icon"></i>
            <span slot="title">{{ item.title }}</span>
          </el-menu-item>
        </template>
      </template>
    </el-menu>
  </div>
</template>
<script>
import bus from '../common/bus'
export default {
  data () {
    return {
      collapse: false,
      items: [
        {
          icon: 'el-icon-lx-home',
          index: 'welding1',
          title: '焊接一车间',
          subs: [
            { icon: 'el-icon-lx-cascades', index: 'dashboard', title: '总览' },
            // { icon: 'el-icon-lx-cascades', index: 'fac_info', title: '单台实时状态' },
            { icon: 'el-icon-lx-cascades', index: 'datalog', title: '数据查询' },
            { icon: 'el-icon-lx-cascades', index: 'alarm_record', title: '报警记录' }
          ]
        },
        // {
        //   icon: 'el-icon-lx-home',
        //   index: 'welding2',
        //   title: '焊接二车间'
        // },
        // {
        //   icon: 'el-icon-lx-home',
        //   index: 'stamping1',
        //   title: '冲压一车间'
        // },
        // {
        //   icon: 'el-icon-lx-home',
        //   index: 'stamping2',
        //   title: '冲压二车间'
        // },
        {
          icon: 'el-icon-lx-cascades',
          index: 'user',
          title: '用户管理'
        }
      ]
    }
  },
  computed: {
    onRoutes () {
      // console.log('菜单路由=' + this.$route.path)
      return this.$route.path.replace('/', '')
    }
  },
  created () {
    // 通过 Event Bus 进行组件间通信，来折叠侧边栏
    bus.$on('collapse', msg => {
      this.collapse = msg
      bus.$emit('collapse-content', msg)
    })
  }
}
</script>
<style scoped>
.sidebar {
  display: block;
  position: absolute;
  left: 0;
  top: 70px;
  bottom: 0;
  overflow-y: scroll;
}
.sidebar::-webkit-scrollbar {
  width: 0;
}
.sidebar-el-menu:not(.el-menu--collapse) {
  width: 250px;
}
.sidebar > ul {
  height: 100%;
}
</style>
